Be generous when putting on sunscreen as it will not work as promised if too little is applied. — dpa
If you have a bottle of sunscreen left over from last summer that's already been opened, you shouldn't use it.
Better to throw it out and buy a new one instead, dermatologists say.
Already a subscriber? Log in.
Subscribe now for a chance to win your dream holiday!
![](https://cdn.thestar.com.my/Themes/img/sub_paywall_TSM.webp)
Cancel anytime. No ads. Auto-renewal. Unlimited access to the web and app. Personalised features. Members rewards.
Follow us on our official WhatsApp channel for breaking news alerts and key updates!